MediiD Accounts are designed for individuals and families mind.
You can easily create profiles for your children & grandparents who do not have the ability to create their own accounts.
You can create as many profiles as you wish, but only up to 10 profiles may be created before you have to add a product to it.
Once one profile has been linked with a product to it, you can then create the 11th profile. This is to stop any abuse of the system, and people loading fake accounts with no relevant data.
You can manage all of your accounts from your My Account section.